Abstract: The topography of the Atticocycladic massif has previously been assumed to be primarily the result of erosion. However detailed field work has shown that the topography is tectonically controlled and is the reuslt of small dispslip displacements on twosets of high angle faults.In order to account for the juxtaposition of the various rock types in the field, previous workers have invoked the existence ofnappe structures and major unconformities. In this paper the existence of such structures is questioned and it is suggested that these juxtapositions can be accounted for by relatively small movements on high-angle faults. The recognitin of these important fault sets considerable simplifies the structure of the Atticocycladic massif.These faults are widespread and it is thought that a considerable amount of vertical movement is associated with tehm. These important faults are not immediately apparent on the areal photographs because movement on the two sets inhitbits the formation of longlinear fault traces.